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Old 09-10-2020, 02:14 PM   #1
oldschoolvolvo
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Default pre-90 exhaust manifold depth?

Anyone have the measurement between the exhaust port flange and the turbo mounting flange on a pre-90 manifold? Is the measurement the same or different than a 90+ manifold?
(I imagine the measurements are close to the same, but if someone could measure it that would satisfy my curiosity )

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Old 09-10-2020, 02:33 PM   #2
neptune
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I've been thinking about doing this for a couple months now so thanks for the motivation.
I get 2-1/8" on the pre -90 and 2-3/8" on the 90- I have lying around. Plus/minus 1/16"

Measurement not mega-accurate, but close. I laid the exhaust ports flat on a countertop with the bulge of the manifold hanging over the edge, clamped the flattest board I have across the mounting flange, and measured down to the countertop. The step on the flange for mounting a factory turbo is not included in that measurement, I am measuring to the flange itself with the studs.

Hope that helps some.
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Old 09-10-2020, 02:51 PM   #3
oldschoolvolvo
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Thanks! Just what I was looking for.
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